What is the pH change when 12.4 mL of 0.138 M is added to 61.6 mL of a buffer solution consisting of 0.134 M and 0.175 M

Asolid that forms and separates from a liquid mixture is called

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Which change to the system wood cause the freely-moving piston to lower?